This heater has several safety devices .. any one of which will set off the alert .. there is a tilt switch.. if the unit starts to fall over or is on a tilt then that will stop its operation ... if the fan quits working or if the air flow is blocked either in the back air intake or the front exhaust then that will trip an over temperature alarm .. then there is a beam of light that goes in front of the heater .. it is aimed from the upper left corner to the bottom right corner .. if anything blocks that light or if the light is misaligned then that will trip the alert and shut off the machine .. make sure nothing is blocking that light or its sensor .. make sure it hasn't been bumped out of alignment ..

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www.askmefast.com/What_does_it_mean_when_my_samsung_tracfone...What does it mean to have a icon appear on my samsung flip phone with icon little phone with ..... A symbol of a phone and exclamation point on my tracfone screen .... "The main screen that looks like a telephone with a red explanation mark.

www.howardforums.com > ... > Tracfone/Net10Aug 17, 2013 - 15 posts - ‎7 authors
From the main screen, press the "Applications" icon at the bottom right of the ... i havethe same phone, can the lg840g be used with safelink?

that means take the car in and have it plugged in there is a code in the system that needs attention, I would not let that go took long they put the ! in there for a reson to tell you that there is sonething serious or possiblysomething will get damaged if you kep driving it that way.